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Allegiant2Go makes it fast and easy to book a vacation online as well as view an itinerary, reserve seats and upgrade to Priority Boarding. The app even allows travelers to check in for their flight ahead of time.

Allegiant2Go is a relatively small app around 10 megabytes in size. It requires iOS 6.1 or later, and it is also compatible with the iPod Touch and iPad. Allegiant Air also has a version of Allegiant2Go that is compatible with Android devices.